feat: add a button to clear logs in the pod logs viewer

[gcadoret]

Description

This PR introduces a small UX improvement to the pod logs viewer by adding a "Clear logs" button.

Currently, users need to refresh or navigate away to reset the displayed logs. This change provides a quick and intuitive way to clear the log output directly from the UI, which improves usability when working with noisy or continuously updating logs.

Scope

• UI-only change (no backend or API impact)
• Does not modify existing log fetching or filtering logic
• Adds unit test coverage for the new behavior

Motivation

When debugging applications, logs can quickly become cluttered. Providing a clear action helps users focus on new incoming logs without extra navigation steps.

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Checklist

• This does not need to be in the release notes (small UX improvement)
• The title of the PR is clear and follows the guidelines
• Closes [ISSUE #] (not applicable)
• UI updated (CLI not impacted)
• Documentation update required? (not required)
• Documentation updated (not required)
• DCO sign-off added to commits
• Unit and/or e2e tests added
• Build is green
• This PR includes a clear explanation of the change

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